SU1187890A1 - Vibration exciter - Google Patents

Abstract

VIBRATOR, containing an axis, driving it to rotate, four unbalanced shafts connected to an axis, a gear synchronizer including two gears, mounted each on a corresponding debalance shaft, and a driving force control mechanism including a rotatable axis installed and associated with two unbalanced shafts carrying gears, a yoke with a toothed sector, characterized in that, in order to expand its functionality, it is equipped with an established like the first second yoke scrap, also having a toothed sector and associated with two other unbalanced shafts, an axle gear mounted on the axis with internal and external teeth and two additional gears mounted on the unbalance shafts carrying the second rocker, and the additional and main gears are pairwise fixed on the rocker arms and interact with a pair of e with internal and external teeth.

Description

The invention relates to devices for exciting vibrations and can be used in the building materials industry, for example, in compacting concrete mixtures.

The purpose of the invention is to enhance the functionality by enabling the control of the direction of the driving force.

FIG. 1 schematically shows the proposed exciter, a cross-section; in fig. 2 - 4 - possible options for the position of the unbalance shafts when adjusting to force it.

The vibration exciter comprises axis 1, drive 2 of its vrash, four unbalanced shafts 3-6 connected to the axis, gear synchronizer, including a gear 7 mounted on axis 1 with internal and external teeth, two gears 8 and 9, mounted each on the corresponding debalance shaft 3 and 4, and two additional gears 10 and 11, installed on each corresponding debalance shaft 5 and 6, the driving force control mechanism, including two rotates 12 and 13 that can be rotated around the axis 1 and 12 15. In this case the rocker 12 and 13 each respectively associated with the two shafts debalanced 3-6. Gears 8 and 9 are fixed on the rocker arm 12, and gears 10 and 11 on the rocker arm 13 and interact with the internal and external teeth of the gear wheel 7. Rotate the rocker arm 12 and 13 around the axis 1 can be carried out, for example, with screws 16 and 17.

Vibro works as follows.

When the actuator 2 is turned on, the gear wheel 7 is rotated, which, with the help of the 8-11 pulleys, causes the unbalance shafts 3-6 to synchronize the rotation, the total driving force of which creates an oscillatory motion. When the unbalance shafts are placed horizontally in one line, the maximum driving force is created, which is directed vertically. The change in the magnitude of the driving force is carried out by turning the gear sectors 14 and 15 and the rocker arms 12 and 13 with the unbalanced shafts 3-b fixed on them to the same angle towards each other (Fig. 2). When turning the unbalance shafts

5 at the same angle in the same direction, i.e. when all unbalance shafts are on the same straight line, the direction of the disturbing force changes, while its value remains maximum (Fig. 3). It is possible to simultaneously change the magnitude and direction of the driving force. In this case, the amplitude value P of the driving force is determined from the dependence

R 2Rd51p (sun / 2),

whereRD is the amplitude value of the driving force created by one pair of unbalance shafts;

szS-angle between pairs of unbalance shafts.

The direction of the driving force is determined by the bisector of the angle θ (Fig. 4). The design of the proposed exciter allows you to smoothly change both the magnitude of the driving force from the maximum value (at "180 °) to almost zero (at 0 °), and its direction from vertical to horizontal, which

expands the range of its use.

FIG. 2

rig.Z

Claims (1)

A VIBRATOR exciter containing an axis, a drive for its rotation, four unbalanced shafts connected to the axis, a gear synchronizer including two gears mounted each on a corresponding unbalanced shaft, and a driving force control mechanism including a rotatably mounted around the axis and connected with two unbalanced shafts carrying gears, a rocker with a gear sector, characterized in that, in order to expand the functionality, it is equipped with a second rocker installed similarly to the first also having a gear sector and connected with two other unbalanced shafts mounted on the axis of the gear wheel with internal and external teeth and two additional gears mounted on the unbalanced shafts bearing the second beam, and additional and main gears are mounted in pairs on the rocker arms and interact with the internal and external teeth. Figure 1